CVE-2026-6554 affecting package libpcap for versions less than 1.10.7-1

{
  "id": "38f1cbff2a9f4dce3466d0af3dffe005da8376ff6aef913eee7d2d5e0a08e05e",
  "url": "https://osv.dev/vulnerability/AZL-99747",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-6554 affecting package libpcap for versions less than 1.10.7-1",
    "summary": "libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.",
    "evidence": "osv:AZL-99747",
    "products": [
      {
        "name": {
          "value": "libpcap",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.10.7-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-99747",
      "aliases": [
        "AZL-99747"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.10.7-1"
                }
              ]
            }
          ],
          "package": {
            "name": "libpcap",
            "purl": "pkg:rpm/azure-linux/libpcap",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99747.json"
          }
        }
      ],
      "modified": "2026-10-23T14:17:39.578972565Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-6554"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-6554"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-6554",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 413702,
  "published_at": "2026-09-05T19:16:56+00:00"
}